Hive Health & Inspection
Varroa Test Kit
Count the mites, then decide — never treat blind.
Varroa destructor is the single greatest threat to managed honey bees worldwide. The mites feed on fat body tissue, vector deforming wing virus, and build up exponentially through the season. A colony can look healthy at 3 mites per 100 bees and be dead by autumn.
The point of a test kit is to convert a vague worry into a number. The two standard methods are the alcohol wash, which is accurate but kills the sample bees, and the powdered sugar roll, which is less accurate but leaves the bees alive. Both use a jar, a sieve and a counting grid.
Treatment thresholds vary by region, colony size and season, but a widely used summer threshold is 2–3 mites per 100 bees. Above that, treat. Test again after treatment to confirm it worked.
At a glance
Safety
An alcohol wash kills the 300 bees in the sample. That is a real cost and it is why the sample is taken from a strong colony and never from a weak one. Isopropyl alcohol is flammable and must be stored and used away from the smoker.
Using it well
- Sample from a frame with capped brood — that is where mites concentrate, not on the outer honey frames.
- Take the sample from the same kind of frame each time so your numbers are comparable.
- Test before treating and again 2–4 weeks after, or you will never know whether the treatment worked.
- Record every count. A single number is meaningless; a trend tells you when to act.
Compatibility
Hive types
- Langstroth
- Top-bar
- Flow
Bees
European honey bee (Apis mellifera)
Educational reference only. Hive & Honey sells no equipment and takes no sponsorship. Specifications here describe typical products in this category; check the actual figures for the item you own or intend to buy. Always follow the manufacturer's instructions and your local regulations.